Siri on Mountain Lion

One addition I would like to see in the final build of OS X Mountain Lion is Siri. But where would Siri live? Easy. Notification Center is hiding under the right side of the desktop wallpaper. Why not have Siri hiding under the left side of the wallpaper?

Just like with Notification Center, a trackpad gesture can slide the wallpaper and activate Siri. And perhaps a menu bar icon and a keyboard shortcut (or even a dedicated key) could as well.